"I'm telling you. These were not just glitches!"

It was just a boring night of watching movies. {A} and {B} were watching a quite old movie while munching some popcorns, before the screen starting to "glitch". It flashed all kind of colors; which was weird since the movie was in black and white. It flashed rapidly all kind of horrid images. Patients dying in hospitals, syringes, dead animals...
{B} quickly turned off the TV, but a little bit too late for {A}; who could swear they saw a man staring through the screen.

A few weeks passed, and the accident deeply marked {A}. They were not acting normal. They became more paranoid, certained they were getting stalked. It became so bad, that even their family became worried for their safety. They finally called {B}, begging them to have a talk with {A} before things would get out of hand.
But,during the talk, {A} started panicking. They were screaming that it was not just some glitching. That someone was after them.

A week passed, and {A} was pronounced dead.

{B}, while helping cleaning {A}'s room for the last time, found some recordings in a box. As if {A} recorded everytime something weird happened...

You continue here.